And john j



(No Model.) 2Sheets-Sheet 1. D; L.-H;OLDEN &- J. J. HAYES.

EXHAUST AND PRESSURE PUMP.

Patented Jan. 26, 1892' (No Model.) I 28heets-She't 2.

D. L. HOLDENKv J. JqHA-YBS. EXHAUST AND PRESSURE PUMP.

No. 467,578. Patented Jan. 26, 1892.

0&0 -%aym UNITED STATES PATENT OFFICE.

DANIEL L. HOLDEN, OF NElV YORK, AND JOHN J. HAYES, OF BROOKLYN,

NEV YORK. I

EXHAUST AND PRESSURE PUMP.

SPECIFICATION forming part of Letters Patent No. 467,578, dated January 26, 1892. Application filed March 23, 1891, Serial No. 885,977. (No model.)

T at whom it 12mg concern; the rock-shaft O is the lever P, with connect- Be it known that we, DANIEL L. HOLDEN, ing-rods Q Q to the pistons R R in the of New York, in the county and State of New pumps S S, so that by this arrangement the York, and JOHN J HAYES, of Br0oklyn,'in the pistons R R are actuated alternately and 55 county of Kings and State of New York, both the pumps are single-acting. The pumps S citizens of the United States, have invented S are provided with flanges 6 and downward an Improvement in Exhaust and Pressure cylindrical extensions 7, passing through Pumps, of which the following is a specificaopenings in the top 5 of the holder A, and tion. the flanges 6 are bolted firmly to such holder 60 This pump is especially intended for use and made air-tight by suitable packing. The in refrigerating apparatus in which anhypistons and valves of the respective pumps drous ammonia is made use of, and the pump are made alike, and the valves are double for is adapted to producing a very perfect vacuincreasing the reliability of their action, as um or of compressing the ammonia or other hereinafter described. It is advantageous to 65 gases or pumping liquid material with great provide air-chambers or expansion-vessels 8 rapidity and reliability. upon the upper parts of the pumps, and the We make use of a holder that receives the discharge passageways 9 are connected to fluid to be operated upon, and above this gether and to a pipeleading to the refrigerholder are two inverted pumps, and the actuator or other apparatus, and between the pis- 7o ating devices for the pumps are within this ton and such discharge passage -ways are holder; and the invention relates to the tea double check-valves. tures of construction hereinafter set forth and The valve 10 rests upon a seat 11, which is claimed. preferably cylindrical and is forced into an In the drawings, Figure l is a vertical sccenlargement of the pump and rests upon a 75 2 5 tion of the holder and pumps, and Fig. 2 is a seat or shoulder, and it is rendered air-tight plan view of the apparatus. either by being ground into its place or by The holder A is preferably in one casting any suitable material upon the respective having a bottom 2, sides 3, ends 4, and top 5, surfaces that are in contact, and the valve 10 and this holder is advantageously used as has a tubular stem 12 and guide-wings 13. 8o 0 the base for supporting the engine-cylinder There may be three or four of these guide- B, which is either vertical or horizontal. W'e wings, so that the valve is kept in position; have represented the same as vertical and but it can be easily ground upon its seat to provided with a piston-rod O and connectingmake it perfectly tight. The tubular stem 12 rod D to the walking-beam E, from which the forms a guide for the stem l t of the valve 15, 8 5 3 5 connecting-rod F passes to the crank Gupon which valve is seated upon a shoulder at the the crank-shaft G, and it is advantageous to upper end of the cylindrical portion of the employ a pinion l-I, driving the gear-wheel I pump-barrel, and this valve 15 may have upon the cross-shaft K, and there are bearguide-Wings 16, if desired. By this construcings or journal-boxes upon the end at of the tion a double check or discharge valve is pro- 0 4o holder A for supporting the shafts G and K. vided for each pump. The pistons of the Upon the gear-wheel I or on a crank is a pumps are provided with similar double crank-pin L and connecting-rod M to the levalves, but of a smaller size, there being a ver-arm N upon the rock-shaft O, which rockvalve 20 upon a seat 21, which is driven into shaft passes through a stuffing box or gland the cylinder-piston tightly upon a shoulder, 5 5 O at one side of the holder A, and it passes and this valve 20 has a tubular stem 22, with into a socket at the other side of such holder guide-wings 23, and the tubular stem 22 re- A. The outer end of this rock-shaft O is prefceives the stem 2a of the valve 25, which valve erably supported by a suitable bearing, such 25 rests upon a shoulder in the piston, which as triangular frame 0 in order that pressure forms a seat, and there may be upon such 100 and wear may be relieved from the packingvalve the guide-Wings 26. The pistons are to gland O. \Vithin the holder A and upon be provided with suitable packing-rings 3O or small grooves 31, or both, to render the pistons gas-tight, but allow them to move freely within the respective pump-cylinders, and the motion given to the respective pistons is to be sufficient to cause the upper fiat surface of the valve 20 to come against the under surface of the valve and slightly lift the same, and these two surfaces are preferably ground together, so that there will not be any intervening appreciable space, and these surfaces are advantageously fiat; but they might be convex or concave and ground together.

The fluid or liquid to be operated upon passes into the holder A by the supply-pipe T. WVhen this pump is to be used with a liquid, the liquid will accumulate in the holder A until it rises as high as the lower ends 7 of the pump-cylinders, and the parts of the pump and connecting-rods will be lubricated thereby, or, where gas is to be pumped, suitable lubricating material is allowed to run into the holder A, and it is advantageous to supply the same progressively, so as to lubricate the parts of the pump, and there should be a trap or similar device .to catch the lubricating material that may pass over through the discharge passage-ways 9, so as to return the same to the holder A, and it will now be apparent that when either piston rises the liquid or gaseous material that is between the upper end of the piston and its valve and the valve 15 is entirely expelled from the pump, because the upper surface of the valve 20 comes in contact with the valve 15 and lifts the same and the valve 15 by its weight will settle down upon the valve 20 as the piston descends and the valve 15 will rest upon its seat before the piston draws away from it. Hence a perfect or nearly perfect vacuum will be formed in the pump-barrel, and whatever liquid or gaseous materials may be in the holder A will pass the valves 20 and into the pump-barrel, to be forced out upon the next rising movement of the piston, and under all circumstances there will be a small quantity of liquid or lubricating material upon the respective-valves and seats to aid in keeping such valves gas-tight, because all the valves close downwardly upon their seats.

This pump can be used in connection with any engine or condenser, or it can be used in a refrigerator for forcing the ammonia under pressure to the condenser or in producing a vacuum in the apparatus, as usual in either absorption or compression refrigerating apparatus.

We claim as our invention- 1. The combination, with the holderA and the pump-barrels S S, passing through the top thereof and fastened thereto, of the rockshaft within the holder and passing through one side thereof, the lever and connecting-rods within the holder, the tubular pistons within the pumps and to which pistons the connecting-rods are jointed, the double valves, one above the other, within the tubular pistons,

and the double check-valves, one above the other, in the discharge-passage at the upper ends of the pump-barrels, substantially as set forth.

2. The combination, with a pump-piston, of a cylinder having a valve-seat at the upper end and being continued upwardly to form a valve-chamber, a removable valve-seat within such chamber, a valve closing downwardly upon the seat at the end of the cylinder, and a valve at the upper end of the removable valve-seat, substantially as specified.

3. The combination, in a pump having an inverted barrel or cylinder and a tubular piston actuated from below, of two Valves, one above the other, in the tubular piston, the upper valve covering the openingthrough the piston and having an upper surface flush with the upper end of the piston, and a valve at the upper end of the pump-barrel and resting upon a seat formed thereat and having a fiat under surface to fit the top of the piston-valve, so that the discharge-valve can rest upon the upper surface of the piston and its valve to exclude air at the time the discharge-valve closes, substantially as set forth.

4. The combination, in a pump having an inverted pump-cylinder and a tubular piston and means for actuating the piston from below, of two valves, one above the'other, in the opening through the piston, and double checkvalves, one above the other, in the dischargeopeuing at the upper end of the pump-cylinder, substantially as set forth.

5. Adouble valve for apump-pistonorcheck, composed of an upper valve with wings sliding in a removable valve-seat and having a tubular stem and a lower valve with a stem passing into said tube, the valve resting upon a seat below the removable valve-seat of the upper valve, substantially as set forth.

6. The combination, with the holder A, of the steam-cylinder supported by the holder, a rock-shaft passing into the holder and provided with a packing-gland, a lever-arm on the rock-shaft outside the holder and connections between the same and the piston of the steam-cylinder, a lever upon the rock-shaft within the holder, pump-cylinders upon the holder and passing through the top thereof, pistons within the pumps and connections from the same to the lever upon the rockshaft, and valves in the respective pumps, substantially as set forth.

Signed by us this 17th day of March, 1891.

DANIELL. HOLDEN. JOHN J. HAYES.

Witnesses:

GEO. T. PINCKNEY, WILLIAM G. MOTT. 

